package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.querydsl.QPageRequest;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    // 员工登录
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 密码进行MD5加密之后在进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }
    // 添加员工
    @Override
    public void save(EmployeeDTO employeeDTO) {
        System.out.println("当前线程的id为:" + Thread.currentThread().getId());
        Employee employee = new Employee();
        // 属性拷贝，将employeeDTO的属性对应传输到employee
        BeanUtils.copyProperties(employeeDTO,employee);
        // 赋值额外的属性
        employee.setStatus(StatusConstant.ENABLE);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //  在设置了公共字段填充之后，就不需要手动书写了
        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        employeeMapper.insert(employee);
    }
    // 员工分页
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //PageHelper.startPage 底层实现了 SQL : limit
        //使用PageHelper实现分页        getPage()为页码           getPageSize()为每页的数据
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //  所以只要拿到数据就行了
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        //拿到page里的数据传到Controller层
        return new PageResult(page.getTotal(),page.getResult());
    }
    //启用或禁用员工账号
    @Override
    public void startOrstop(Integer status, long id) {
        Employee employee = Employee.builder()
                        .status(status)
                        .id(id)
                        .build();
        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(Integer id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }
    // 编辑员工
    @Override
    public void edit(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 属性拷贝，将employeeDTO的属性对应传输到employee
        BeanUtils.copyProperties(employeeDTO,employee);
        //  在设置了公共字段填充之后，就不需要手动书写了
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }

}
